一、在线浓度折光仪 聚酯原料浓度在线测控产品介绍

The online refractometer is also known asOnline concentration meter, online refractive concentration analyzer, based on the principle of total reflection critical angle of light in liquids, detects the liquid refractive index in real time, and converts and outputs solution concentration, sugar content, solids content, and medium temperature, enabling real-time detection of liquid in production pipelines and reactors.Uninterrupted in-situ online monitoring。

No manual sampling or reagent consumables required; the probe is directly installed in pipelines, tanks, or bypass loops for 7×24-hour continuous detection, with measurement data uploaded to the central control system in real time. It can be linked with PLC/DCS for closed-loop automatic concentration control, replacing traditional manual titration and handheld refractometer spot checks, eliminating pain points such as sampling lag, large human errors, and unstable batches. Widely used for liquid concentration control in industrial production processes.

The instrument is divided intoProbe + transmitter split type / integrated display typeTwo structures available: standard industrial type and sanitary food-grade, explosion-proof and corrosion-resistant type, suitable for transparent and semi-transparent liquids; slightly turbid media can also be measured stably without interference from liquid color.

二、在线浓度折光仪 聚酯原料浓度在线测控测量原理

The light source emits light onto the contact surface between the sapphire prism and the measured liquid. When light enters the liquid from the prism, total reflection occurs; the CCD photosensitive array captures the position of the critical ray of total reflection and calculates the liquid refractive index. Combined with the built-in temperature compensation algorithm, the refractive index is converted into the corresponding solution concentration value, and real-time temperature data is output simultaneously.

三、在线浓度折光仪 聚酯原料浓度在线测控核心技术参数（表格版）

Customizable explosion-proof, high-temperature, high-corrosion-resistant, and sanitary versions based on working conditions

表格

Projeto	Especificações técnicas
Meio de medição	Soluções aquosas transparentes e semitransparentes, solventes orgânicos, soluções ácidas, alcalinas e salinas, xaropes, emulsões, etc.
Faixa de medição de concentração	0‑90 % Brix (faixa de concentração personalizável para meios específicos)
Precisão da medição de concentração	±0.1 %
Resolução de Concentração	0.01%
Faixa de medição do índice de refração	1.3330‑1.5000RI
Precisão do índice de refração	±0.0001 RI
响应速度	≤5 segundos
Faixa de temperatura do meio	-20℃ ~ +100℃ (modelo de alta temperatura até 130℃)
温度补偿	Compensação automática de temperatura multiponto integrada, conversão automática para concentração padrão a 25℃
Material padrão de contato com líquido	Aço inoxidável 316L + prisma de safira, opções anticorrosivas: liga Hastelloy, Alloy20
Nível de resistência à pressão	1.5MPa（16bar）
Grau de proteção	IP68
Nível de proteção à prova de explosão (opcional)	Ex ia IIC T6 à prova de explosão de segurança intrínseca
信号输出	Sinal analógico 4‑20mA, comunicação digital RS485‑Modbus RTU, 2 saídas de alarme por relé
供电电源	DC24V
安装方式	Flange de tubulação, interface sanitária de grampo triplo, instalação lateral em tanque, instalação em derivação, instalação suspensa por imersão
Versão sanitária adequada	Suporta limpeza e esterilização CIP/SIP in situ, sem pontos mortos sanitários

四、在线浓度折光仪 聚酯原料浓度在线测控主要功能特点

1. Real-time continuous online monitoring: No need to stop for sampling, 24-hour continuous detection with no lag in concentration data.
2. 自动温度补偿: Eliminates measurement deviations caused by liquid temperature fluctuations, ensuring stable and reliable data.
3. No consumables, no reagents: Optical non-contact measurement, no moving parts, low later maintenance cost, and long service life.
4. Custom concentration modelingBuilt-in curves for common media such as sugar, alkali, and alcohol; for non-standard formula solutions, calibration data can be manually entered to fit a dedicated concentration conversion curve.
5. Upper and lower limit alarm function: Automatic relay alarm when concentration exceeds limits, with external audible and visual alarm.
6. Industrial signal interface to central control: 4-20mA, RS485 can be directly connected to PLC and DCS control systems for closed-loop control of automatic feeding, dilution, and evaporation concentration.
7. Probe self-diagnosis function: Automatically detects prism fouling and light source anomalies, prompting timely cleaning and maintenance.
8. Multiple installation options available: Direct pipeline, bypass loop, reactor side wall, and immersion suspension in tank, suitable for retrofitting new and existing production lines.
9. Sanitary / explosion-proof and corrosion-resistant optional: No dead corners for food and pharmaceutical hygiene; explosion-proof version for flammable and explosive chemical conditions; special alloy probes for highly corrosive liquids.
10. Historical trend recording: The transmitter can store concentration-temperature trend data for production traceability and quality control.